package cn.edu.scau.cmi.zhengweibo.chapter6;
class People {
   float weight,height;
   String name;
   void speak(String s) {
      System.out.println(s);
   }
}
class Student extends People {
   int number;
   double add(double a,double b){
      return a+b;
   } 
} 
public class Example6_1 {
   public static void main(String args[]) {
      Student zhangSan = new Student();
      zhangSan.weight=65.9f; 
      zhangSan.height=182f;
      zhangSan.name="张三"; 
      zhangSan.number=201011;
      zhangSan.speak("我是"+zhangSan.name+",我的学号:"+zhangSan.number);
      System.out.println("我的身高:"+zhangSan.height+"cm,我的体重:"+zhangSan.weight+"kg");
      System.out.println("我会做加法:");
      double sum=zhangSan.add(23.5,879.987);
      System.out.println("sum="+sum);
   }
}

